What is the best way to market a social app to college-aged students during summer vacation? Is paid advertising the only way?

Building a brand takes more than a logo. With that said, consistency is key for obtaining a competitive advantage that speaks to your market for longer. I would recommend against using different styles and colors for various purposes and instead maybe avoid using in lieu of the logo use maybe instead borders or patterns that use your logo's or brand colors. The idea of a logo is to engrave a mission or product into potential customers when they simply see the brand or logo... Once a logo is pushed and promoted you can strengthen that image by enforcing the brands colors through different materials or media :)

I'm answering your question assuming that you hope to be able to replicate it's own success in your own mobile app. There are a couple of factors responsible for it's growth that are instructive to anyone building a mobile app. "Leveraging the intimacy and privacy of the mobile phone." We now have an *intimate* relationship with our phone like no other device in the history of technology. Every internet company that started before around 2010 has built their core interactions around "the old web" one which was accessed primarily via a browser on a computer. Companies that start with a clean slate, should be building their interactions around how to do whatever the app is supposed to do while leveraging what is unique to people's relationship to their mobile devices. Photo-sharing has become a core part of the way we communicate now. Snapchat built something that provided an experience that leveraged the feeling of privacy and intimacy that is unique to mobile. "Provided an escape from the "maturity" of other online services." Too many parents, aunts, uncles and other "old people" have encroached into the social networks of teens and young people. As a result, they've had a desire to find places to express themselves in places inaccessible by older generations. An important distinction is that it's not just parents and relatives that young people are trying to avoid, but also employers & colleges who are increasingly using "mature" social networks to review applicants. "Leveraged PR even bad PR" The fact that the app got so much press about it being used to sext was perfect PR for the company, as it essentially reinforced the brand experience that it has today. Essentially, "if it's safe enough to send a sext, it's safe for any kind of communication I want to have." And although the safety and security of Snapchat is actually not as advertised, it still enjoys the reputation of having less impact than any primarily web-based service. Building a successful mobile application is one of the hardest challenges to face designers, programmers and entrepreneurs in the history of writing software. Happy to talk to you if you're considering building a mobile app, about what I've learned about the "table stakes" for success.

Build a body of work in the form of a blog. Much depends on the size and scope of your company, but branded journalism can really make a huge difference.....

You've answered your own question. Reach out to your prospects with the question, such as "How would you...". Ask what people want then give it to them if you can with integrity and thoughtfulness.

I don't even know how to answer this. Do you know what the difference between McDonalds and the local burger joint that is filing for bankruptcy is? It's marketing. McDonalds is worth billions of dollars not because of the quality of their food, but because of their marketing. Marketing is not an expense. A janitor is an expense. Your computer is an expense. Marketing is an INVESTMENT. Would you shop around for the cheapest heart surgeon? Of course not. Because you would likely end up dead. Why, then, do you shop around for a marketing expert? Are you ok with your company going bankrupt? Is that worth the small savings to you? No. Of course not. Hire someone who is good at marketing. Hire someone who knows what they are doing. Buy yourself a Lamborghini with your profit the first quarter. Get a beach house in hawaii. Grab a yacht. Or, try to find your business the cheapest heart surgeon you can and then spend the next five years wondering why such a solid business idea failed in the first 6 months. I'm passionate about this exact topic because all those statistics you read about "70% of businesses failing in two years" are solely because of horrible marketing.